Windows Cannot Install Required Files. Make sure all the files required for installation are available and restart the installation. Error code: 0x8007025D
Usually, people connect this problem with media error - your installation source is corrupted. Microsoft and various guids recommend creating new installation CD or USB. In my case, it was my hard drive. I had to delete the partition and experiment with splitting original partition into smaller ones. The goal is to have one as big partition as possible that is healthy - because Program Files folder grows exponentialy :) It took me some time (in days) to finally get it right.
